Saitou casually mentions that he has a wife to Kenshin and Misao (the manga puts in a "Not Making This Up" Disclaimer). The latter two promptly discuss what kind of woman would marry him. A Buddha is mentioned. Cue Imagine Spot.
During the Kyoto arc, Kenshin purposely walked around carrying a sword to avoid contact with other people. Then a flatfoot cop chases him... all day.
What dark adventures awaits me, in the treacherous city of Kyoto....
You got some guts to carry a sword in the face of the Sword Prohibition laws!! Stop!! Stop I say!!
A post-Kyoto arc Filler episode is a Crowning Episode of Funny. An episode's worth of Hilarity Ensues, all from an engagement ring that Kenshin gives to Kaoru without knowing its meaning... and for worse, it belongs to someone else. After many failed attempts to retrieve it, Kaoru goes into a Heroic Blue Screen of Death after finding out that the ring isn't for her: She gets so mad that he does some earth shattering move on Sanosuke and Yahiko, the directions on how to do it on a Playstation controller is shown below.
And by the end she's seen pigging out in the Akebeko, intending to binge until she passes out.
At some point, Kaoru imagines Kenshin proposing to her and then, um, well... the two of them are suddenly hidden by the bushes and then a flower falls off a nearby branch, complete with Kaoru crying out Kenshin's name passionately. Cut to Kaoru who has passed out on the street from the sheer hotness of the mental image.
Talking about filler, what about that time the crew visited a spa...
In Shin Kyoto Hen, Shishio notices that Kenshin brought a woman along and says that Shingetsu Village's hot springs are good for healing wounds as well as getting women to open updown there. Misao, said woman, was not amused.
At the start of the Jinchuu arc, Enishi dubs the group the Six Comrades. Otowa disapproves, and what follows is a short but hilarious argument over what the group should call themselves.
Banjin: Inui and his Followers!
Gein: Gein and his Merry Men.
Kurajinami: I am NOT merry.
Mumyoi: From the Ceiling with Love.
The Brazilian translation of the manga also did it superbly well.
And before that there is the delightful exchange when they are introduced to the hidden Yatsume Mumyol who remains in the ceiling
Yatsume: It is very nice to meet you (still in the ceiling not showing himslef)
Banjin: Nice to meet us?! Get down here!
Gein: At least show us your face [Beat] What?... (note Gein wears a mask himself)
Banjin is clearly not amused by that.
After the Aoiya fight and the defeat of the Oniwabashuu sent there, Kaoru speaks to Misao about Kenshin...
Misao:(rather dreamily) Ah, Kaoru-san! I get what you say. Your feelings for Himura-san aren't much different to what I feel for Aoshi-sama...
Tsubame finding out Megumi is in her 20s during the gang's last day in Kyoto.
Later, Sanosuke explains to Yahiko that a woman who wasn't married at age 18 (like Tomoe before marrying Kenshin) was considered an "old maid". Cut to the 23-year-old Megumi's face...
At the end of very first chapter, after Kenshin decided to stay in the Kamiya Kasshin Dojo, Kaoru asks his age. In which Kenshin cluelessly started counting his age with his fingers.
Also at the third chapter, with Kenshin in the house, it would seem that the Dojo would get a lot of students... Cue Kenshin declaring that he's not accepting students, all would-be students leaves. Cue Kaoru beating the ever-loving crap of Kenshin.
After the fight with Jin'ei, Kenshin returned a ribbon that Kaoru entrusted to him. Only to find out that it's bloody thanks to his fight with Jin'ei. And Kenshin went home being beaten to crap by Kaoru.
To top it all, Sanosuke believes that the two were doing something else alone together...
In an early filler, a Gentle Giant sumo rookie named Toramaru befriends Kenshin and Kaoru, and she decides to help him train so he can return to his sumo training grounds as soon as possible. Sanosuke asks her if she's going to wear a fundoshi while doing so; Kenshin, Sano and Yahiko start imagining a topless Kaoru... and then she beats the shit outta them.
This exchange before the Shishio/Kenshin fight.
Shishio: You're badly injured. Can you actually fight with your full strength like that?
Kenshin: If we're comparing appearances, then I can say the same about you.
One side storyfocusing on Yahiko (volume 5) had everyone wonder where Yahiko has been running off to and keeping a secret about about. Kenshin guesses that he is training, Kaoru thinks it's about food, and Sanosuke thinks it's about a girl. They all turn out to be right ... sort of.
The end of the chapter has Yahiko in a fight with a group of thugs, though Kenshin and Sano scare most of them off just by looking at them. When he reveals he knows the two are hiding on the roof, they attempt a poor imitation of cicadas, before he points out it's the wrong season.
Yahiko getting mad every time the girl he's trying to help calls him Yahiko-chan.
Yahiko: "Stop with the -chaaaaaaaan!"
Tsubame: "I'm so sorryyyyy!"
The whole side-story made it to the anime. It's just as funny and cute as in the original.
Kaoru: "You guys are so naive! You thought we'd strip, knowing that YOU woud be here?"
Later, as Kenshin is bathing alongside the (peeved) Sano and Yahiko, he overhears the girls and their hostess talking about Yuutarou and Raijuuta. He realizes that Yuutarou is in serious danger, and in the middle of his Eureka Moment he goes to the girls's springs and tells them what's going on... while totally buttnaked. Then he stares at the girls's horrified faces, looks down at his own naked body — and the camera/page focuses on (the still rather peeved) Sano and Yahiko, who snark between themselves as Kaoru beats the fuck out of Kenshin off-screen/off-page and Megumi verbally lashes out at him as well.
After Kenshin's sword is broken, he looks for the man who forged it. That man is dead, but his son has gone into blacksmithing. So Kenshin goes to the son's house... and finds a baby sitting on a cushion. Who asks to shake. Kenshin promptly shakes the kid's hand. That's the old man's grandson; his son comes out of the back room a moment later.
Saitoh and Usui suddenly laughing in the middle of their fight. It's just feels so random that it's utterly hilarious, capped off by Usui ending his laugh with "What's so funny!?"
Dojo fight scene at the beginning. The hired thugs attempting to evict Kaoru ignore her pleas to remove their sandals upon entering her dojo, even jeering at her for it. note In Japan, not removing one's shoes when entering someone else's home is a sign of disrespect. Doubly so to a martial artist when it involves the dojo. Kenshin, amidst his laying the smackdown on the thugs, takes the time to calmly remove his sandals and bows politely to the dojo before entering to continue his ass whooping.
Takeda Kanryu is such an unrepentant and cold-blooded asshole, but the way he does almost all of it with the crazy mix of pettiness and hamminess makes him stand out as a Love to Hate villain. For example: having your mooks murder the apothecaries who made your prize opium: seriously bad. Picking out a survivor with "eenie-meenie-minee-mo" while a circus-y Leitmotif plays in the background (Kanryu Teikoku ~Gashuu no Take~ in the soundtrack): comedy gold of the pitch-black humour variety. (It crosses into Actor Allusion considering Kanryu's actor, Teruyuki Kagawa, also played the asshole-yet-unfortunate Iwasaki Yataro in the historical drama Ryomaden, whose ex-samurai merchant background Kanryu shares.)
Almost ANY scene involving Sanosuke in this film manages to be Crowning Moments of Funny in themselves, what with his hamminess and enthusiasm taken Up to Eleven. But the crowner goes to Sano's fight with Kanryu's bodyguard, Inui Banjin. The brawl manages to break through the walls into the kitchen, at which point Sano calls a time-out to sample some of the chicken and wine. He offers Banjin some of the chicken too, but he turns out to be a vegetarian and is distraught at the fate of the poor bird. Banjin nonetheless takes a swig of the wine, after which they continued brawling.
The fight initially starts out like your typical brawl, but once they reach the kitchen, it becomes a succession of what Improvised Weapon they can grab next whether it be tables, pans, plates, or bags of flour, eventually leading to Sano's infamous time out.